Grill cover



FIG. 1 is a front right perspective view of a grill cover in accordance with the present design;

FIG. 2 is a front side elevational view thereof;

FIG. 3 is a rear side elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a left side elevational view thereof; and,

FIG. 6 is a top plan view thereof.

The broken lines shown illustrate stitching and form no part of the claimed design. 

CLAIM The ornamental design for a grill cover, as shown and described. 